Chemistry - Thermodynamics - II Question with Solution | TestHub

(a) TΔ S is the energy that cannot be converted to work: true. (b) A decrease in G is the maximum available (useful) work, not unavailable energy: incorrect. (c) In an isothermal expansion of an ideal gas Δ U = 0 so q = w, and all heat is converted into work (the gas changes state): incorrect. (d) The same holds for the irreversible isothermal case: incorrect. Ans: (b), (c), (d).